Astronomy
Rainbow Blue
Rainbow Blue
#0099FFClick to copy
Rainbow Blue Parameter Conversion Table
More converters →HEX#0099FFCopy
RGBrgb(0, 153, 255)Copy
HSLhsl(204, 100%, 50%)Copy
HSV/HSBhsv(204, 100%, 100%)Copy
CMYKcmyk(100%, 40%, 0%, 0%)Copy
Rainbow Blue Color Schemes
Complementary
#0099FF
Click to copy#FF6600
Click to copyAnalogous
#00FFE5
Click to copy#001AFF
Click to copySplit Complementary
#FF0019
Click to copy#FFE600
Click to copyMonochromatic
#0099FF
Click to copy#71C0F4
Click to copy#D0EAFB
Click to copy#005C99
Click to copy#001F33
Click to copy#000000
Click to copyRainbow Blue WCAG Accessibility Contrast
WCAG Calculator →The contrast ratio of this color against common foreground/background colors (based on the WCAG 2.1 standard)
Sample text Aa
White background #FFFFFF
3.00 : 1
AA NormalAA LargeAAA NormalAAA Large
Sample text Aa
Black background #000000
7.00 : 1
AA NormalAA LargeAAA NormalAAA Large
Sample text Aa
Light gray background #F5F5F5
2.75 : 1
AA NormalAA LargeAAA NormalAAA Large
Sample text Aa
Dark gray background #333333
4.21 : 1
AA NormalAA LargeAAA NormalAAA Large
Rainbow Blue Shade Variants
Gradient Generator →Lighten with White Mixed with white for a lighter, softer color
10%
20%
30%
40%
50%
60%
70%
80%
90%
Darken with Black Mixed with black for a deeper, heavier color
10%
20%
30%
40%
50%
60%
70%
80%
90%
Muted / Morandi Mixed with gray and desaturated for a sophisticated muted tone
10%
20%
30%
40%
50%
60%
70%
80%
90%
Rainbow Blue Color Introduction
Definition
Rainbow Blue (HEX #0099FF) has the RGB value rgb(0, 153, 255), the HSL value hsl(204°, 100%, 50%) and the CMYK print value cmyk(100%, 40%, 0%, 0%). In terms of color schemes, the complement of Rainbow Blue is #FF6600, and placing the two side by side produces a striking, eye-catching contrast; paired with the analogous colors #00FFE6 and #0019FF that sit next to it on the color wheel, it transitions naturally and harmoniously; in a split-complementary scheme (#FF001A, #FFE500) it keeps its contrast tension without losing layering; and a monochromatic scheme built on Rainbow Blue uses gradients of lightness and saturation to create a unified design with a strong sense of depth. Under the WCAG accessibility standard, Rainbow Blue has a contrast ratio of 3.00:1 against white and 7.00:1 against black; paired with a black background it reaches AAA, making it ideal for text and accent colors in dark mode.
Color Characteristics
Blue is the color of sky and ocean, evoking vastness, trust and reason. Steady and imposing, it is almost irreplaceable in technology, finance and corporate identity design. Specifically, Rainbow Blue has a lightness of 50% and a saturation of 100%, striking and generous as a background or primary color, offering good readability with either light or dark text; moreover, its saturation is extremely high and its visual tension is strong, so it works best used sparingly as a focal accent. In a word: The blue of a rainbow, pure and clear, with a slight coolness.
Color Psychology
Blue can evoke calm, focus and trust, with a marked stabilizing effect; psychologically it symbolizes reason, loyalty and depth. For this reason Rainbow Blue tends to leave a first impression of being cool and reliable in the viewer’s mind, and this emotional tone also defines the role it plays in design.
Best Uses
Blue suits fintech, corporate websites, government systems and any scene that needs professional trust. In real projects, Rainbow Blue is also often used as a dark background or heading text color; in “Blue”-themed designs, the adjacent colors or lightness gradients built around it quickly establish a cohesive, clearly layered color scheme.
Rainbow Blue Featured In
This color is included in the following color cards and color families. Click a card to browse more colors in the corresponding collection.
